Implements metrics for destination search.

BUG=128275
TEST=

Review URL: https://chromiumcodereview.appspot.com/10480002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@140240 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 92 insertions, 3 deletions

diff --git a/chrome/browser/resources/print_preview/metrics.js b/chrome/browser/resources/print_preview/metrics.js
new file mode 100644
index 0000000..bdeaf14
--- /dev/null
+++ b/chrome/browser/resources/print_preview/metrics.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+cr.define('print_preview', function() {
+  'use strict';
+
+  /**
+   * Object used to measure usage statistics.
+   * @constructor
+   */
+  function Metrics() {};
+
+  /**
+   * Enumeration of metrics buckets to record.
+   * @enum {number}
+   */
+  Metrics.Bucket = {
+    // Used when the print destination search widget is shown.
+    DESTINATION_SEARCH_SHOWN: 0,
+    // Used when the user selects a print destination.
+    DESTINATION_SELECTED: 1,
+    // Used when the print destination search widget is closed without selecting
+    // a print destination.
+    DESTINATION_SELECTION_CANCELED: 2,
+    // Used when the Google Cloud Print promotions is shown to the user.
+    CLOUDPRINT_PROMO_SHOWN: 3,
+    // Used when the user chooses to sign-in to their Google account.
+    SIGNIN_TRIGGERED: 4
+  };
+
+  Metrics.prototype = {
+    /**
+     * Increments the counter for a given bucket.
+     * @param {!print_preview.Metrics.Bucket} bucket Bucket to increment.
+     */
+    increment: function(bucket) {
+      chrome.send('reportDestinationEvent', bucket);
+    }
+  };
+
+  // Export
+  return {
+    Metrics: Metrics
+  };
+});
diff --git a/chrome/browser/resources/print_preview/print_preview.js b/chrome/browser/resources/print_preview/print_preview.js
index 1fa15a3..3635062 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -34,6 +34,13 @@ cr.define('print_preview', function() {
     this.userInfo_ = new print_preview.UserInfo();
 
     /**
+     * Metrics object used to report usage statistics.
+     * @type {!print_preview.Metrics}
+     * @private
+     */
+    this.metrics_ = new print_preview.Metrics();
+
+    /**
      * Data store which holds print destinations.
      * @type {!print_preview.DestinationStore}
      * @private
@@ -64,7 +71,7 @@ cr.define('print_preview', function() {
      * @private
      */
     this.destinationSearch_ = new print_preview.DestinationSearch(
-        this.destinationStore_, this.userInfo_);
+        this.destinationStore_, this.userInfo_, this.metrics_);
     this.addChild(this.destinationSearch_);
 
     /**
@@ -611,6 +618,8 @@ cr.define('print_preview', function() {
           !e.metaKey) {
         if (this.destinationSearch_.getIsVisible()) {
           this.destinationSearch_.setIsVisible(false);
+          this.metrics_.increment(
+              print_preview.Metrics.Bucket.DESTINATION_SELECTION_CANCELED);
         } else {
           this.close_();
         }
@@ -650,6 +659,8 @@ cr.define('print_preview', function() {
     onDestinationChangeButtonActivate_: function() {
       this.destinationSearch_.setIsVisible(true);
       this.destinationStore_.startLoadAllCloudDestinations();
+      this.metrics_.increment(
+          print_preview.Metrics.Bucket.DESTINATION_SEARCH_SHOWN);
     },
 
     /**
@@ -731,6 +742,7 @@ cr.define('print_preview', function() {
 <include src="cloud_print_interface.js"/>
 <include src="print_preview_utils.js"/>
 <include src="print_header.js"/>
+<include src="metrics.js"/>
 
 <include src="settings/page_settings.js"/>
 <include src="settings/copies_settings.js"/>
diff --git a/chrome/browser/resources/print_preview/print_preview_utils.js b/chrome/browser/resources/print_preview/print_preview_utils.js
index 14eec32..a7b6a74 100644
--- a/chrome/browser/resources/print_preview/print_preview_utils.js
+++ b/chrome/browser/resources/print_preview/print_preview_utils.js
@@ -187,8 +187,16 @@ function pageSetToPageRanges(pageSet) {
 }
 
 /**
+ * @param {!HTMLElement} element Element to check for visibility.
+ * @return {boolean} Whether the given element is visible.
+ */
+function getIsVisible(element) {
+  return !element.hidden;
+}
+
+/**
  * Shows or hides an element.
- * @param {Element} element Element to show or hide.
+ * @param {!HTMLElement} element Element to show or hide.
  * @param {boolean} isVisible Whether the element should be visible or not.
  */
 function setIsVisible(element, isVisible) {
diff --git a/chrome/browser/resources/print_preview/search/destination_search.js b/chrome/browser/resources/print_preview/search/destination_search.js
index 05c2cee..332e9b11 100644
--- a/chrome/browser/resources/print_preview/search/destination_search.js
+++ b/chrome/browser/resources/print_preview/search/destination_search.js
@@ -14,10 +14,11 @@ cr.define('print_preview', function() {
    *     containing the destinations to search through.
    * @param {!print_preview.UserInfo} userInfo Event target that contains
    *     information about the logged in user.
+   * @param {!print_preview.Metrics} metrics Used to record usage statistics.
    * @constructor
    * @extends {print_preview.Component}
    */
-  function DestinationSearch(destinationStore, userInfo) {
+  function DestinationSearch(destinationStore, userInfo, metrics) {
     print_preview.Component.call(this);
 
     /**
@@ -35,6 +36,13 @@ cr.define('print_preview', function() {
     this.userInfo_ = userInfo;
 
     /**
+     * Used to record usage statistics.
+     * @type {!print_preview.Metrics}
+     * @private
+     */
+    this.metrics_ = metrics;
+
+    /**
      * Search box used to search through the destination lists.
      * @type {!print_preview.SearchBox}
      * @private
@@ -136,6 +144,12 @@ cr.define('print_preview', function() {
         this.searchBox_.focus();
         this.getElement().classList.remove(
             DestinationSearch.Classes_.TRANSPARENT);
+        var promoEl = this.getElement().getElementsByClassName(
+            DestinationSearch.Classes_.CLOUDPRINT_PROMO)[0];
+        if (getIsVisible(promoEl)) {
+          this.metrics_.increment(
+              print_preview.Metrics.Bucket.CLOUDPRINT_PROMO_SHOWN);
+        }
       } else {
         this.getElement().classList.add(DestinationSearch.Classes_.TRANSPARENT);
         // Collapse all destination lists
@@ -167,6 +181,10 @@ cr.define('print_preview', function() {
       var promoEl = this.getElement().getElementsByClassName(
           DestinationSearch.Classes_.CLOUDPRINT_PROMO)[0];
       setIsVisible(promoEl, true);
+      if (this.getIsVisible()) {
+        this.metrics_.increment(
+            print_preview.Metrics.Bucket.CLOUDPRINT_PROMO_SHOWN);
+      }
     },
 
     /** @override */
@@ -301,6 +319,8 @@ cr.define('print_preview', function() {
     onCloseClick_: function() {
       this.setIsVisible(false);
       this.resetSearch_();
+      this.metrics_.increment(
+          print_preview.Metrics.Bucket.DESTINATION_SELECTION_CANCELED);
     },
 
     /**
@@ -313,6 +333,8 @@ cr.define('print_preview', function() {
       this.setIsVisible(false);
       this.resetSearch_();
       this.destinationStore_.selectDestination(evt.destination);
+      this.metrics_.increment(
+          print_preview.Metrics.Bucket.DESTINATION_SELECTED);
     },
 
     /**
@@ -382,6 +404,7 @@ cr.define('print_preview', function() {
      */
     onSignInActivated_: function() {
       cr.dispatchSimpleEvent(this, DestinationSearch.EventType.SIGN_IN);
+      this.metrics_.increment(print_preview.Metrics.Bucket.SIGNIN_TRIGGERED);
     },
 
     /**